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What is chemical reaction ? Explain briefly |
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Answer» A reaction in which a change occurs in a substance and results in a change in its identity and composition to form a new substance which has its own characteristics and properties During a chemical reaction, the substances that react are known as reactants whereas the substances that are formed during a chemical reaction are known as products. Six common types of chemical reactions are discussed below.\tTypes of Chemical ReactionsExplanationGeneral ReactionCombination reactionTwo or more compounds combine to form one compound.A + B\xa0→ ABDecomposition\xa0reactionThe opposite of a combination reaction – a complex molecule breaks down to make simpler ones.AB\xa0→ A + BPrecipitation\xa0reactionTwo solutions of soluble salts are mixed resulting in an insoluble solid (precipitate) forming.A + Soluble salt B → Precipitate + soluble salt CNeutralization reactionAn acid and a base react with each other. Generally, the product of this reaction is a salt and water.Acid + Base\xa0→ Salt + WaterCombustion\xa0reactionOxygen combines with a compound to form carbon dioxide and water. These reactions are exothermic, meaning they give off heat.A + O2\xa0→ H2O + CO2Displacement\xa0reactionOne element takes place with another element in the compound.A + BC\xa0→ AC + B\t Process in which new compounds with new properties are formed |
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